EEPOET ON VAEIOrS MANUEES AT CHISWICK. 
37 
a rise to maximum (/). The observations on this box are im- 
perfect, as at first the presence of Poa annua was not noticed. 
Of V. {Poa trivialis, annua ?) the plants manifested generally 
a high range, sinking in July, but recovered at the close of the 
experiment. 
In vi. (Bromus) little or no fluctuation was observed throughout. 
To vii. {Trifolium pratense) the ammonia-salts seem to have 
been of but slight advantage, as the vigour was uniformly low. 
In viii. {Lotus) the medium degree {d) was attained, without 
appreciable fluctuation. 
In ix. {Trifolium repens) the vigour was uniformly low. 
In X. {Plantago) considerable fluctuation was manifest, at first 
medium {d), rising to e, and subsequently declining to c. 
Of xi. {Achillea) the plants treated with ammonia-salts were 
uniformly of a good degree of vigour {d). 
In xii. {Carum) frequent fluctuations were observable, though 
the range was not great. 
In the case of the ammonia-salts, it would seem^ that the re- 
sults are too discordant to enable any safe conclusions to be drawn 
from them. So far as these experiments go, however, it would 
appear that the ammonia-salts are varied in their influence on 
the grasses. In the case of the Clovers the changes are less sudden 
and varied, and it might be inferred that ammonia-salts were of 
little use to them. The Plantain and Carum showed much fluc- 
tuation, the Milfoil little or none. 
Box 4i. Nitrate of Soda. 
The plants of i. {Dactylis)^ treated with this substance, exhibited 
great variation. Beginning high (/) , the plants sunk to d through- 
out May, rose again in June to f and afterwards experienced a 
slight decline. 
In ii. {Antlioxantlmiii) the changes were great ; at first me- 
dium, the plants showed a slight rise at the end of May, then a 
fall, and a much greater rise in October. 
In iii. {Lolium) a medium degree was attained throughout the 
summer ; but in October it is noted that the plants had attained 
to/ 
In iv. {Poa annua) a medium w^as attained, with a slight rise 
in July. 
In V. (P. trivialis) a uniformly medium {c) degree of vigour 
was observed throughout. 
